<template>
  <el-container class="home-container">
    <!-- 头部区域 -->
    <el-header>
      <div>
        <img src="../assets/logo.png" height="60px"/>
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout()">退出系统</el-button>
    </el-header>
    <!-- 主体区域 -->
    <el-container>
      <el-aside :width="isCollapse ? '64px':'200px' ">
        <div class="toggleCollapse" @click="toggleCollapse">{{isCollapse ? '展开':'收起'}}</div>
        <el-menu
          background-color="#333744"
          text-color="#fff"
          active-text-color="#409eff"
          unique-opened
          :collapse="isCollapse"
          :collapse-transition="false"
          router
          :default-active="activePath">
          <el-submenu :index="item.id + ''" :key="item.id" v-for="item in menulist">
            <template slot="title">
              <i :class="iconsObj[item.id]"></i>
              <span>{{item.authName}}</span>
            </template>
            <el-menu-item
            :index="'/'+subItem.path"
            :key="subItem.id"
            v-for="subItem in item.children"
            @click="saveNavState('/'+subItem.path)">
              <template slot="title">
                <i class="el-icon-menu"></i>
                <span>{{subItem.authName}}</span>
              </template>
              </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <el-main>
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  data () {
    return {
      menulist: [],
      iconsObj: {
        '125': 'iconfont icon-user',
        '103': 'iconfont icon-tijikongjian',
        '101': 'iconfont icon-shangpin',
        '102': 'iconfont icon-danju',
        '145': 'iconfont icon-baobiao'
      },
      isCollapse: false,
      activePath: ''
    }
  },
  created () {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout () {
      // 删除token
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    async getMenuList () {
      // 请求路径menus 请求方式get
      let { data: res } = await this.$http.get('menus')
      this.menulist = res.data
      console.log(this.menulist)
    },
    // 控制菜单折叠或展开
    toggleCollapse () {
      this.isCollapse = !this.isCollapse
    },
    // 保存菜单激活状态
    saveNavState (activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  }
}
</script>

<style lang="less" scoped>
.home-container{
  height: 100%;
}
.el-header{
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  color: #fff;
  font-size: 22px;
  align-items: center;
  > div{
    display: flex;
    align-items: center;
    span {
      margin-left: 20px;
    }
  }
}
.el-aside{
  background-color: #333744;
  > .el-menu{
    border-right:none;
  }
}
.el-main{
  background-color: #eaedf1;
}
.iconfont{
  margin-right: 10px;
}

.toggleCollapse{
  background-color: #4a5064;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.2em;
}
</style>
